michael.cook@sfr.fr said: > The relevant NTP leap-seconds-list file can be downloaded with anonymous ftp > from the pub directory at time.nist.gov. (The leap-seconds-list file is a > symbolic link to the data file leap-seconds.3676924800 in the same > directory. ) The NIST servers at that "host" don't work very well for FTP. That host name rotates across their NTP servers and a lot of those sites don't have a FTP server on that machine. Some of the sites work. ftp://utcnist.colorado.edu/pub/ The IETF has a copy, but it hasn't been updated yet. http://www.ietf.org/timezones/data/ USNO has a similar version: ftp://tycho.usno.navy.mil/pub/ntp/ Sometimes it doesn't work. ?? Meinberg has a version: http://www.meinberg.de/download/ntp/leap-seconds.list -- These are my opinions. I hate spam.

Hal Murray wrote: > > michael.cook@sfr.fr said: >> The relevant NTP leap-seconds-list file can be downloaded with anonymous ftp >> from the pub directory at time.nist.gov. (The leap-seconds-list file is a >> symbolic link to the data file leap-seconds.3676924800 in the same >> directory. ) > > The NIST servers at that "host" don't work very well for FTP. That host name > rotates across their NTP servers and a lot of those sites don't have a FTP > server on that machine. > > Some of the sites work. > ftp://utcnist.colorado.edu/pub/ > > The IETF has a copy, but it hasn't been updated yet. > http://www.ietf.org/timezones/data/ No, because it's extracted from the TZ database. The leap second file in the TZ DB is only updated when the next TZ DB version is released after a new leap second file has been released. Just recently a patch has been submitted for the TZ DB to update the leap second file. > USNO has a similar version: > ftp://tycho.usno.navy.mil/pub/ntp/ > Sometimes it doesn't work. ?? > > Meinberg has a version: > http://www.meinberg.de/download/ntp/leap-seconds.list which is a copy of the IERS file available at https://hpiers.obspm.fr/iers/bul/bulc/ntp/ I've put some information on leap second files together in a PDF: https://www.meinberg.de/download/burnicki/the_ntp_leap_second_file.pdf BTW, some GPS satellites began recently to broadcast the leap second information. The "mbgstatus" program for Meinberg PCI cards reports: ----------------------------------------------------------- t0t: 1906|405504.0000000, A0: 0 A1: -1.77636e-15 WNlsf: 1929, DN: 7, offs: 17/18 UTC offset transition from 17s to 18s due to leap second insertion at UTC midnight at the end of 2016-12-31. ----------------------------------------------------------- Martin